Found out a real nice way to create reflections. I know theres the old method of flipping the map underneath, and the method of using water underneath the floor.
This uses the new EP2 engine feature of “func_reflective_glass”
Basically, make a func_reflective_glass with the appropriate texture for where your floor is going to be.
Make your floor texture over the entire func_reflective_glass, tie the entity “func_brush” to it, and set the alpha to 180.
Make a “clip” texture above the entire floor, otherwise objects will bounce if something else hits the floor.